| 摘要 |
PROBLEM TO BE SOLVED: To make reducing the current consumption reducible by reducing the number of voltage follower circuits, and to miniaturize a drive source device and to reduce the cost by reducing the mounting area of an IC chip, etc. SOLUTION: One side or another side of two middle voltages divided by plural resistor elements R1-R5 is selected at every frame to be outputted from a switch SW1. One side or another side of another two middle voltages is selected at every frame by the switch SW2 to be outputted. Those selected middle voltages are processed by a P type drive voltage follower circuit P1 and an N type drive voltage follower circuit N1 so that a prescribed current is obtained, and a supply voltage and lowest potential are outputted to a switch circuit 10 together with those four kinds of voltages. Further, a liquid crystal panel drive voltage whose voltage polarity is inverted at every frame is applied to plural common terminals and segment terminals of a matrix liquid crystal panel through an output circuit (common terminal side) 20, a segment 1, and the liquid crystal panel is driven.
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